That's so weird; why would you want to antagonize the crowd like that? Maybe he's just trying to get them riled up. I noticed the same thing about the vocalist for A Life Once Lost when I saw them years ago; he looked like he had so much personal beef with every audience member that I though the whole show was gonna turn into some kind of crazy, beef-filled cheeseburger picnic gone wrong.

My friend said something similar when he saw the Dillinger Escape Plan years ago. Apparently the singer kept alternating between glaring at him and making cock-sucking motions at him. Another great way to antagonize the crowd.